<template>
	<el-breadcrumb class="app-breadcrumb" separator="/">
		<transition-group name="breadcrumb">
			<el-breadcrumb-item v-for="(item,index) in levelList" :key="item.path">
				<span v-if="item.redirect==='noRedirect'||index==levelList.length-1" class="no-redirect">{{ item.meta.title }}</span>
				<a v-else @click.prevent="handleLink(item)">{{ item.meta.title }}</a>
			</el-breadcrumb-item>
		</transition-group>
	</el-breadcrumb>
</template>

<script>
	export default {
		data() {
			return {
				levelList: null
			}
		},
		watch: {
			$route() {
				this.getBreadcrumb()
			}
		},
		created() {
			this.getBreadcrumb()
		},
		methods: {
			getBreadcrumb() {
				// only show routes with meta.title
				let matched = this.$route.matched.filter(item => item.meta && item.meta.title)
				const first = matched[0]

				if (!this.isDashboard(first)) {
					matched = [{path: '/dashboard', meta: {title: 'Dashboard'}}].concat(matched)
				}

				this.levelList = matched.filter(item => item.meta && item.meta.title && item.meta.breadcrumb !== false)
			},
			isDashboard(route) {
				const name = route && route.name
				if (!name) {
					return false
				}
				return name.trim().toLocaleLowerCase() === 'Dashboard'.toLocaleLowerCase()
			},
			handleLink(item) {
				const {redirect, path} = item
				console.log(item)
				if (redirect) {
					this.$router.push(redirect)
					return
				}
				this.$router.push(path)
			}
		}
	}
</script>

<style lang="scss" scoped>
	.app-breadcrumb.el-breadcrumb {
		display: inline-block;
		font-size: 14px;
		line-height: 50px;
		margin-left: 8px;

		.no-redirect {
			color: #97a8be;
			cursor: text;
		}
	}
</style>
